Patents by Inventor Otto Grill

Otto Grill has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Interfacial blending agent for natural fiber composites
    Patent number: 5858522
    Abstract: The invention describes a process for the preparation of a natural fiber and thermoplastic composite and the resulting products therefrom.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: January 12, 1999
    Assignee: Formtech Enterprises, Inc.
    Inventors: David L. Turk, Otto Grill
  • Process to make a composite of controllable porosity
    Patent number: 5738935
    Abstract: The invention described both a process for the preparation of a natural fiber and thermoplastic composite and the resulting products therefrom.
    Type: Grant
    Filed: February 22, 1996
    Date of Patent: April 14, 1998
    Assignee: FormTech Enterprises, Inc.
    Inventors: David L. Turk, Otto Grill
  • Sandable and stainable plastic/wood composite
    Patent number: 5700555
    Abstract: A composite article includes a first zone made entirely of plastic and a second zone made of plastic and natural fiber. The first and second zones are integral and are continuously coextruded. The ratio of natural fiber in the second zone is between 10% and 55%. The outer surface of the second zone includes embossing to resemble wood grain. The outer surface has sufficient porosity so as to hold and retain wood stain and paint so that the composite article is stainable to resemble genuine wood. The composition of the second zone includes between 45% and 90% polyvinylchloride, between 10% and 55% natural fiber, and external lubricate and a fusion enhancer. A color adjusting agent such as titanium dioxide, and coloring agents may also be added.
    Type: Grant
    Filed: August 30, 1993
    Date of Patent: December 23, 1997
    Assignee: Formtech Enterprises, Inc.
    Inventor: Otto Grill